基础提供程序在iis7中的wcf中出现Open异常时失败

我创建了一个ASP.NET MVC 3应用程序，并且在DAL中有一个ADO.NET实体数据模型，其中也包含访问数据的类。

我还创建了一个WCF restful服务，用于与我的android应用程序进行通信。所以当我试图在IIS7上托管我的服务时，我得到了这个错误：

基础提供程序在Open和此处失败：

服务器在处理请求时遇到错误。异常消息为"基础提供程序在打开时失败。"。有关详细信息，请参阅服务器日志。异常堆栈跟踪位于

System.Data.EntityClient.EntityConnection.OOpenStoreConnectionIf（布尔值openCondition，DbConnection storeConnectionToOpen，DbConnectionoriginalConnection，String exceptionCode，String attemptedOperation，布尔运算&closeStoreConnectionOnFailure）位于的System.Data.EntityClient.EntityConnection.Open（）位于的System.Data.Objects.ObjectContext.EnsureConnection（）System.Data.Objects.ObjectQuery 1.GetResults(Nullable 1forMergeOption）System.Data.Objects.ObjectQuery 1.System.Collections.Generic.IEnumerable<T>.GetEnumerator() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable 1source）在System.Linq.Queryable.FirstOrDefault[TSource]（IQueryable `1源）的SecurityLayer.Authentification.Auth.VerifAuth（用户u）c： ''Users''ines''Documents''Visual Studio2012''Projects''GestionDeCompabilite''ControlLayer''Authentification''Auth.cs:line16在ManagementServices.AllServices.Authentication（字符串伪，字符串密码）2012''Projects''GestionDeComptabilie''ManagementServices''AllServices.svc.cs:line28在的SyncInvokeAuthentification（Object，Object[]，Object[]）System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke（对象实例，Object[]输入，Object[]&输出）System.ServiceModel.Dispatcher.DispatchOperationRuntime.IInvokeBegin（MessageRpc&rpc）System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5（MessageRpc&rpc）System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31（MessageRpc&rpc）在System.ServiceModel.Dispatcher.MessageRpc.Process（布尔isOperationContextSet）

附带说明一下，当我从Visual Studio启动WCF服务时，它没有问题，问题仅在于IIS。当我搜索这个问题时，我尝试了这些建议作为解决方案的东西：

• 从连接字符串中删除集成安全性
• 使用sql身份验证
• 创建一个帐户并授予其访问数据库的权限，并确保iis中的应用程序可以访问数据库
• 添加了除CGI之外的"应用程序开发特性"的所有组成部分

我还尝试了在这些链接中提出的所有解决方案，但都不起作用：

MSSQL错误'；基础提供程序在打开'；

还有这个：

实体异常：基础提供程序无法打开

如果有人能帮忙，我将不胜感激。

更多信息，这里是我的代码：

using SecurityLayer.Authentification;
using DataRepository.DAL;
using DataRepository.Data;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Activation;
namespace ManagementServices
{        
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
    public class AllServices : IAllServices
    {
        public bool Authentification(string pseudo, string password)
        {           
            User u = new User
            {
                UserName = pseudo,
                Password = password
            };
            Auth a = new Auth() ;
            if (a.VerifAuth(u)) return true;
            return false;
        }
    }
}


using System;   
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
namespace ManagementServices
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IAllServices" in both code and config file together.
    [ServiceContract(Namespace="http://Services.Compta.com")]
    public interface IAllServices
    {
        [OperationContract(Name="Authentification" )]     
        [WebInvoke(UriTemplate = "/Auth/{pseudo}/{password}", Method = "GET", BodyStyle = WebMessageBodyStyle.Wrapped, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]       
        bool Authentification(string pseudo, string password);
    }
}

 <?xml version="1.0" encoding="UTF-8"?>
    <configuration>
      <system.webServer>
        <validation validateIntegratedModeConfiguration="false" />  <modules runAllManagedModulesForAllRequests="true" />
        <directoryBrowse enabled="true" />
      </system.webServer>
      <connectionStrings>
        <add name="GestionComptabiliteEntities" connectionString="metadata=res://*/Data.GestionComptabiliteModel.csdl|res://*/Data.GestionComptabiliteModel.ssdl|res://*/Data.GestionComptabiliteModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=(localDB)'v11.0;attachdbfilename=C:'Users'ines'Documents'Visual Studio 2012'Projects'GestionDeComptabilite'DataRepository'App_Data'GestionComptabilite.mdf;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
      </connectionStrings>
      <appSettings>
        <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
      </appSettings>
      <system.web>
        <compilation debug="true" targetFramework="4.5" />
        <httpRuntime targetFramework="4.5" />    <identity impersonate="true" />
      </system.web>   
      <system.serviceModel>
        <bindings>
          <basicHttpBinding>  <binding name="NewBinding0" /> </basicHttpBinding>
        </bindings>
        <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
        <standardEndpoints>
          <webHttpEndpoint>
            <standardEndpoint name="" helpEnabled="true" automaticFormatSelectionEnabled="true"></standardEndpoint>
          </webHttpEndpoint>
        </standardEndpoints>
        <services>
          <service name="ManagementServices.AllServices" behaviorConfiguration="restBehavior">
            <endpoint address="" behaviorConfiguration="a" binding="webHttpBinding" name="xml" contract="ManagementServices.IAllServices" />
            <endpoint address="basic" binding="basicHttpBinding" bindingConfiguration="" contract="ManagementServices.IAllServices" />
          </service>
        </services>
        <behaviors>
          <serviceBehaviors>
            <behavior name="restBehavior">
              <serviceMetadata httpGetEnabled="true" />
              <serviceDebug includeExceptionDetailInFaults="true" />
            </behavior>
          </serviceBehaviors>
          <endpointBehaviors> <behavior name="a">   <webHttp /> </behavior> </endpointBehaviors>        </behaviors>     </system.serviceModel>
    </configuration>

请注意，这是一个WCF restful应用程序，而不是一个库，我也在VirtualBox中的Windows 7 Ultimate 64位下运行。